Scraper pan



June 12, 1934. J. A. DERSHM v 1,962,811

SCRAPER PAN Original Filed Oct. 15. 1931 2 Sheets-Sheet l June 12, 1934. J, A, DERSHEM SCRAPER PAN Original Filed Oct. l5. 1931 2 Sheets-Sheet 2 JuDenS/ew.

Patented June 12, 1934 Unire!) STATES SCRAPER PAN James A. Dershem, Orchard, Colo.`

Original application October 15, 1931, Serial No. 569,039. Divi-ded and this application June 6,

1932, Serial No. 615,688

This invention relates to wheeled Scrapers for use in excavating or forming ditches or performing other work where dirt is to be moved from one location and shifted to another, the

" present application being a division of an application led by me October 15, 1931, Serial No. 569,039. The present invention relates particularly to the scraper pan and provides means for reinforcing the pan and means for retaining a load therein. The invention is illustrated in the accompanying drawings and will be hereinafter fully described and particularly defined.

In the drawings, Figure 1 is a vertical longitudinal section of a portion of an excavator 15v in which the improved pan is employed,

Fig. 2 is a View, partly in elevation and partly in section, of one of the pans,

Fig. 3 is a detail sectional View illustrating the manner of dumping the pan,

'20j Fig. 4 is a detail perspective view showing a part of the pan-supporting elements,

Fig. 5 is a detail perspective View of the latch.

The main frame of the machine comprises channel side bars 1 and an inverted channel '25j bar 2 secured to and between the side bars between the ends thereof. The front ends of the side bars are connected to a tractor or other hauling agency (not shown). Upon the side bars 1, approximately midway the length there- *3g of, are secured pillars or standards 11 having bearings at their upper end in which an axle 13 is journaled. Upon the ends of the axle 13 are mounted ground wheels 14, which may be of any preferred detail form, and are fitted loosely upon the axle but connected therewith through pawl and ratchet mechanism whereby the differential movement of the wheels, when turning corners, will be accommodated and motion will be imparted to the axle when the machine is being drawn forwardly, but, during backward movement of the machine, the wheels will turn without imparting movement to the axle.

' An upper frame 18 is erected upon and firmly j secured to the side bars 1 and upon this frame is supported mechanism for raising and lowering the pans. Scraper pans are provided at the front and at the rear of the central cross bar 2 of the main frame and each of these 50" scraper pans is provided on its ends near its back with trunnions 19 adapted to engage bearings 20 provided therefor upon the side bars of the main frame, as shown most clearly in Fig. 2. Each scraper pan comprises a bottom rT plate 21 having a cutting blade 22 secured to the underside thereof and projecting beyond the front edge thereof, as shown clearly in Figs. 1 and 3. The bottom 21 is preferably formed integral with the end members 23 and at the upper rear corner of each pan is secured a rod 24 upon which is hinged an end gate 25 which normally closes the back of the pan. At

its ends, adjacent its lower edge, the end gate is provided with laterally extending pins 26 adapted to be engaged by hooks 27 pivoted upon @5f the ends of the pan whereby the end gate will be held in closed position. A stop pin 28 is provided upon each end of the pan, below the adjacent hook, to prevent the hook dropping to such a position that it cannot engage the projection on the end gate, and a short chain or other ilexible connection 29 is attached to the free end of the hook, and to the adjacent portion of the frame, so that, when the rear end of the pan is swung downwardly, the chains will be drawn taut and the hooks released from the pins 26 so that the end gate may open automatically and the load be discharged. Susp pension braces 30, of the triangular form shown clearly in Figs. 1 and 3, are hung upon the gm respective rods 24 and are secured at their lower ends to the bottom plates 21 of the respective pans so that the bottoms of the pans will be held against buckling under the weight of the load imposed thereon.

At the upper front corner of each end 23 of each pan is secured a bracket 31 and secured in and extending between these brackets is a rod 32. The ends of the rod 32 on the pan project laterally from the brackets so that they may, at times, rest upon the upper edges of the adjacent side bars 1, as shown in Fig. 4. This position will be assumed when the pan is to take up dirt and the ends of the rod then resist the strain upon the pan and prevent it from digging g5 into the ground to an excessive depth. Cables for supporting and adjusting the pans are connected with the rods 32 and with winding drums which are mounted loosely upon the axle 13, and are adapted to be driven thereby through suitable clutches.

Assuming the front pan is to be set in working position, the operating mechanism is manipulated so that the pan will turn about its pivotal supports 19 and will present its blade to the m5 surface of the ground so that, if the machine be drawn forward, the surface soil will be taken up and loaded into the pan. When the pan has been loaded, and the load is to be carried to the ldumping place, the operating mechanism is manipulated to raise the front side of the front scraper pan and permit the rear scraper pan to rock into the rigging position. When the front pan has been returned to a level position, the operating mechanism is set to hold that position, and the load may then be carried to the desired place. When the rear pan has taken up a load, the operating mechanism is again adjusted and the rear pan lifted to load-carrying position. When the load in the front pan is to be dumped, an additional vertical movement will be imparted to the front of the pan, the back thereof being consequently moved down- Wardly, as shown in Fig. 3, and this movement will cause the chains 29 to become taut and release the hooks 27 so that the end gate may open and the load be discharged. After the front pan has discharged its load, the rear pan may be caused to discharge itsload in a corresponding manner. It will be understood that the operating mechanism includes holding de- Vices so there will be no shifting of the pans While they are at Work or While they are carrying a load.

Having thus claim:-

In a Wheeled scraper, a main frame, a scraper pan pivotally mounted on the main frame and comprising a bottom and ends, a rod mounted at the upper rear corners of the ends, an end gate mounted on said rod, means for holding the end gate normally in position to close the back of the pan, a rod carried by the front end of the pan and adapted to engage the main frame for limiting the downward pivotal movement of the pan, and braces mounted on the rst mentioned rod and secured to the bottom of the pan.

described the invention, I

JAMES A. DERSHEM. 

